A dead giveaway of the bug is using -dd and seeing a ton of hardware check errors.
That's probably it!
[02.06.11 23:34:37] Added Barts (#1) (14 CU, local work size of 192)
[02.06.11 23:34:37] DEBUG: Enabling long poll support
[02.06.11 23:34:37] DEBUG: Enabling long poll support
[02.06.11 23:34:37] DEBUG: Enabling long poll support
[02.06.11 23:34:48] DEBUG: Attempt 1 found on Barts (#1)
[02.06.11 23:34:48] DEBUG: Invalid block found on Barts (#1), possible driver or hardware issue
[02.06.11 23:34:56] DEBUG: Attempt 2 found on Barts (#1)
[02.06.11 23:34:56] DEBUG: Invalid block found on Barts (#1), possible driver or hardware issue
[02.06.11 23:34:58] DEBUG: Attempt 3 found on Barts (#1)
[02.06.11 23:34:58] Block 1 found on Barts (#1)1
[02.06.11 23:35:15] DEBUG: Attempt 4 found on Barts (#1)
[02.06.11 23:35:15] Block 2 found on Barts (#1)6
[02.06.11 23:35:25] DEBUG: Attempt 5 found on Barts (#1)
[02.06.11 23:35:25] Block 3 found on Barts (#1),0
[02.06.11 23:35:26] DEBUG: Forcing getwork update due to nonce saturation
[02.06.11 23:35:26] DEBUG: Forcing getwork update due to nonce saturation
[02.06.11 23:35:26] DEBUG: Forcing getwork update due to nonce saturation
[02.06.11 23:36:13] DEBUG: Forcing getwork update due to nonce saturation
[02.06.11 23:36:13] DEBUG: Forcing getwork update due to nonce saturation
[02.06.11 23:36:13] DEBUG: Forcing getwork update due to nonce saturation
[02.06.11 23:36:15] DEBUG: Attempt 6 found on Barts (#1)
[02.06.11 23:36:16] Block 4 found on Barts (#1),4
[02.06.11 23:36:18] DEBUG: Attempt 7 found on Barts (#1)
[02.06.11 23:36:18] DEBUG: Invalid block found on Barts (#1), possible driver or hardware issue
[02.06.11 23:36:19] DEBUG: Attempt 8 found on Barts (#1)
[02.06.11 23:36:19] Block 5 found on Barts (#1),4
[02.06.11 23:36:29] DEBUG: Attempt 9 found on Barts (#1)
[02.06.11 23:36:29] DEBUG: Invalid block found on Barts (#1), possible driver or hardware issue
[02.06.11 23:36:50] DEBUG: Attempt 10 found on Barts (#1)
[02.06.11 23:36:50] Block 6 found on Barts (#1),9
[02.06.11 23:36:53] DEBUG: Attempt 11 found on Barts (#1)
[02.06.11 23:36:53] Block 7 found on Barts (#1),0
[02.06.11 23:36:53] DEBUG: Attempt 12 found on Barts (#1)
[02.06.11 23:36:53] Block 8 found on Barts (#1),0
[02.06.11 23:37:01] DEBUG: Forcing getwork update due to nonce saturation
[02.06.11 23:37:01] DEBUG: Forcing getwork update due to nonce saturation
[02.06.11 23:37:02] DEBUG: Forcing getwork update due to nonce saturation
[02.06.11 23:37:03] DEBUG: Attempt 13 found on Barts (#1)
[02.06.11 23:37:03] Block 9 found on Barts (#1),0
[02.06.11 23:37:25] DEBUG: Attempt 14 found on Barts (#1)
[02.06.11 23:37:25] DEBUG: Invalid block found on Barts (#1), possible driver or hardware issue
[02.06.11 23:37:37] DEBUG: Attempt 15 found on Barts (#1)
[02.06.11 23:37:38] Block 10 found on Barts (#1)8
[02.06.11 23:37:49] DEBUG: Forcing getwork update due to nonce saturation
[02.06.11 23:37:49] DEBUG: Forcing getwork update due to nonce saturation
[02.06.11 23:37:49] DEBUG: Forcing getwork update due to nonce saturation
[02.06.11 23:38:36] DEBUG: Forcing getwork update due to nonce saturation
[02.06.11 23:38:36] DEBUG: Forcing getwork update due to nonce saturation
[02.06.11 23:38:37] DEBUG: Forcing getwork update due to nonce saturation
[02.06.11 23:39:11] DEBUG: Attempt 16 found on Barts (#1)
[02.06.11 23:39:11] DEBUG: Invalid block found on Barts (#1), possible driver or hardware issue
[02.06.11 23:39:13] DEBUG: Attempt 17 found on Barts (#1)
[02.06.11 23:39:13] Block 11 found on Barts (#1)3
[02.06.11 23:39:23] DEBUG: Forcing getwork update due to nonce saturation
[02.06.11 23:39:24] DEBUG: Forcing getwork update due to nonce saturation
[02.06.11 23:39:25] DEBUG: Forcing getwork update due to nonce saturation
[02.06.11 23:39:30] DEBUG: Attempt 18 found on Barts (#1)
[02.06.11 23:39:30] Block 12 found on Barts (#1)4
[02.06.11 23:39:41] DEBUG: Attempt 19 found on Barts (#1)
[02.06.11 23:39:41] Block 13 found on Barts (#1)3
270047/269776 khash/sec | ghash: 82,0 | fps: 29,3^C
Now...
user@host:~/...../DiabloMiner$ git pull
Already up-to-date.
AFAIR, there were no updates since i cloned the repo from github yesterday. Even if there were, I just did a "mvn package" to recompile and still getting the hardware issue in my log. I hope I'm not doing it wrong.

Again, thanks for your support and fast miner.